Damper.



1. c. FQSCHAFER.

DAMPER.

1,296,857, f Patented Maf. 11,1919.

FCE.v

JOHN C. F. SCI-IAFEB, 0F MOUNT PULASKI, ILLNOIS.

DAMPER.

To all ywhomy t may concern:

Be 1t known that I, JOHN C. F. SCHAFER, a citizen of the United States, residing at Y Mount Pulaski. in the county7 of Logan and pipes. The purposes of the invention are to provide in conjunction with the pipe and the damper plate more effective and convenient means than have hitherto been employed to perforate the pipe with which the damper plate is used; to provide on the damper plate, in conjunction with the pipe, means whereby the perforations in the wall of the pipe may be made at a uniform distance from one terminal edge of the Wall of the pipe, gaged by instrumentalities constituting part of the damper plate itself, and to provideimproved details of construction, to Vbe hereinafter described and finally recited in the claims.

The invention is illustrated in the annexed drawing in which the same reference numbers designate the same parts in both views.

Figure 1 is a top plan of the damper in closed position in a stove pipe, and Fig. 2

Vrshows, in side elevation, a damper plate on a stove pipe'in position for perforating the pipe. Y y Y he circular damper plate l is preferably of cast iron, but obviously may be pressed from sheet metal. The plate 1 has a smoke opening 12; a transverse radial slit 2; a notch 3 in line with' the slit 2; an internally screw threaded boss 4 at right angles to the plate and adapted to accommodate the screw-threaded part 7 of the damper-rod 6;V

a forked boss 5in range with the boss 4; a

circular strengthening rim 10; concave-com Y `Vex members 9 in pairs in range with each other, the members of the respective pairs being curved oppositely to accommodate the damper-rod 6, andthe members of one pair having notches 19 to accommodate radial pins 13 on the rod 6; and openings 20 between the pairs of members 9 and adapted to be traversed by the pins 13 when the rod 6 is rotated in the members 9.

The boss 4 serves as a screw-support, and

the boss 5 serves as an abutment againstl which the wall of the pipe is held while per forating it.

Y I have shown the screw-support and the Specification of Letters Patent. Y

Application filed Uetocer 4, 1915.

Serial No. 54.009.

abutment integral Vwith the damper plate; but they may be made separately and attached in any suitable manner to the damper plate.

The damper rod 6 has a handle 14 for inanipulating the'rod; a collar 17 adapted to slide in the sleeve 15, radial pins 13 adaptedto engage in the notches 19 of the members 9;V a screw-threaded part 7 Vadapted to en gage the internal screw threads of the boss 4; and a tapered terminal 8 adapted to perforate the metal of the pipe 18.

The rod 6 serves as an axle for the damper plate; Vand in conjunction with the screwsupport 4 and the abutment 5, serves to perforate the wall of a pipe held against the abutment while the rod is turned in the screw-support.

A coiled spring 16 surrounds the part of the rod 6 which is in the sleeve 15 and acts on the collar 17 to normally keep Vthe parts in the position shown in Fig. 1. Pushing on the handle 14 will cause withdrawal of the half-rotation of the rod 6 to disengage the pins 13 from the ends of the concavo-convex Patented nar. 11, 1919.

members 9 to permit the rod to slide out- Y wardly into such position that the inner pin 13 may traverse the adjacent opening 20, and a second half-rotation of the rod Will disengage the inner pin 13 from the inner end of the outerl member V9 so that the rod 6 may be completely withdrawn from the members 9.

To perforate'the pipe 18 preparatory to placing the damper plate 1 in proper positionin the pipe, the plate will be placed on the pipe with the upper edge of the pipe in the notch 3 and the wall of the pipe in the slit 2 and adjacent to the abutment 5; the

rod 6 will then be screwed into the screwsupport 4 to bring` the point 8 in contact with the outer surface of the pipe to press the wall of the pipe against the abutment 5, and the rod will then be rotated to cause the tapered terminal 8 to perforate the wall of the pipe. The plate 1 will then be moved f at right' aI-lgles to the axis of the pipe, thereby assuring accurate placing of the plate in the pipe. v

I am aware that ldamper rods'ada'ptedto' Vperforate pipes have been used and that damper plates having oppositely curved concavo-convex members adapted to accommodaterthefdamper rod' have been used.'v I therefore, do not broadlyv claimthose features of construction.

What Ixclaim asi new anddesire to secure by Letters Patenty is l. Av damper adapted for use in a pipe; comprising a discal main structure adapted /for'usef as a dampery plate andl havingy rod supporting members, a central opening, a

. radialslitriadapted toaccommodate thewall of astove pipe, and notch inline withsaid sliti and; adapted to accommodate the upper edge of the wallof the pipe, a screwthreaded lug onjone sidei of Vsaid slit, an abutment on thecoppositeside of said slit Y and'inlinewith the screwfthreaded lug,and

a pointed damper rodhavingnear its pointedf endl a screw adapted to .engage ins'the screw-threadedv lugto cause Vthe point ofthe' rodto perforatevthe wall-.of thefpipe upon rotation of the rod.

2. Adamper adaptedor use in a pipe; comprising discal base adaptedfor use as a damper plate and having a central-opening,

alsohavinga slit: adaptedf'to accommodate the .wallofaspipe ;V a screw threaded lug-extended-outwardly from 'the base Aon one side of the slits; an abutment extending outwardly from thefbasel onathe opposite side oi2 f the slit;Av Y rodAv supporting I members dia- V metric =to the base and adapted to accommo-V date a damper rodfto support the base inthe pipe; andA a screw-threaded damper-rod' adapted to engage in*` the screw-threadedV lugy on the base while in use to perforate the Wall off the pipe, alsoadapted .to occupy said rod-supporting members while not-in use for perforating the wall of the pipe.

3: In a damper, Vthe combination of a Copies lof this patent maybe obtained for five cents each, by addressing the Commissioner of riatents; Y

"the wall off the pipe.

damper plate; an abutment on the damperV plate and complemental to the'screw support; and a pointed screw-rod adapted to serve as the axle of the damper plate and also adapted to engage in the screw-support to causev the rod to perforate the -wallofthe pipe in contact with the abutment during the rotation of the rod in the screw-support.

4. A damper adapted `for use ina pipe,-f

comprising a plate *havingy a slit adaptedlto accommodate the wall of a pipe, a screwf threaded member on one side ci' the slit,an abutment on the opposite side of the slit, in line with. the screw-threaded membery and rod-supporting members transverse to the plate and adapted to accommodate a rod to support the platevin a pipe; and a screwthreaded damper rodl adapted to engage in Y the screw-threaded member of the plate,

while inuse to perforate the wall of a pipe, also adapted to occupy said; rod-VsupportingV members Awhilefnot in use forl perforating 5. In anappliance of.y the class described, thelcombination of a--pipe, a damper-plate havingA rod-supporting members, a -central opening,v a slit, a notchV inV line with the'slit,A

a screw-supportandgan abutment in linewith thescrewsupport; anda pointed screw-rodadaptedto Vserve as V*a* supportf forv they damper-plate, also adapted to engage insaid screw-support tomalije a perforation in the wall of a pipefoccupyinggtheslit and notch in the damper'plate, said.perforationfbeing.

at a distance romthe end'of'thepipeequal Y to thedistance romithe apex of" said notch tothe axis of said screw. f

Witnesses:

RAY LEAPLEY, WALTER A. SGHAFER.

Washington, D. C.

JOHN C. F. SCILIA'FER.YV

c 8 In witnesswhereof Ifhave hereunto signed 

